Micro SD Data Sheet - Super Talent Technology

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1) CS: Host to card Chip Select signal. 2) SCLK: Host to card clock signal. 3) Data In: Host to card data signal. 4) Data Out: Card to host data signal. Another SPI common characteristic, which is implemented in the Memory Card as well, is byte transfers. All data tokens are multiples of 8 bit bytes and always byte aligned to the CS signal.

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